sweetp/dashboard

'use strict';

angular.module('dashboardApp').factory('Observable', function($log) {
    return stampit().enclose(function () {
        var events;

        events = {};

        this.addEvents = function (names) {
            names.forEach(function(name) {
                events[name] = [];
            }, this);
        };

        this.fireEvent = function (name) {
            if (!events[name]) {
                $log.error("Event " + name + " doesn't exist!");
                return;
            }

            events[name].forEach(function(handler) {
                handler();
            });
        };

        this.on = function (name, handler, scope) {
            if (scope) {
                handler = _.bind(handler, scope);
            }

            if (!events[name]) {
                $log.error("Event " + name + " doesn't exist!");
                return;
            }

            events[name].push(handler);
        };

        this.un = function (name, handler, scope) {
            if (scope) {
                handler = _.bind(handler, scope);
            }

            if (!events[name]) {
                $log.error("Event " + name + " doesn't exist!");
                return;
            }

            _.remove(events[name], function (item) {
                return item === handler;
            });
        };
    });
});